WO2017031857A1 - Dispositif de construction d'un modèle de prédiction de subsidence du sol d'un réservoir de caverne de sel à deux cavités - Google Patents

Dispositif de construction d'un modèle de prédiction de subsidence du sol d'un réservoir de caverne de sel à deux cavités Download PDF

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WO2017031857A1
WO2017031857A1 PCT/CN2015/096203 CN2015096203W WO2017031857A1 WO 2017031857 A1 WO2017031857 A1 WO 2017031857A1 CN 2015096203 W CN2015096203 W CN 2015096203W WO 2017031857 A1 WO2017031857 A1 WO 2017031857A1
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double
reservoir
model
analysis
rheological
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PCT/CN2015/096203
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Chinese (zh)
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赵红霞
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深圳朝伟达科技有限公司
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    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16Z—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS, NOT OTHERWISE PROVIDED FOR
    • G16Z99/00—Subject matter not provided for in other main groups of this subclass

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  • the invention relates to the technical field of underground space, in particular to a device for constructing a prediction model for ground settlement of a double-solution cavity salt storage.
  • the double-cavity salt cavern storage is obtained by establishing the double-cavity salt cave model and using the probability integral formula derived from the semi-infinite mining in two-dimensional space.
  • the expression of settlement in the center of the reservoir, and then the expression of the settlement of the double-solution cavity reservoir center is used as a prediction model for the settlement of the double-cavity salt cavern reservoir.
  • the probability integral formula derived from the two-dimensional space semi-infinite mining does not reflect the anisotropic properties of the salt layer in three-dimensional space.
  • the correlation model of the double-cavity salt cavern reservoir land subsidence prediction model for the double-solution cavity It is not accurate enough to predict the ground subsidence of the salt cavern reservoir.
  • embodiments of the present invention provide a method and apparatus for constructing a prediction model for a ground settlement of a double-solution cavity reservoir.
  • the technical solution is as follows:
  • a method for constructing a prediction model for a ground settlement of a double-cavity salt cavern reservoir comprising:
  • the key points of the three-dimensional geological analysis model for selecting the double-solution cavity salt reservoir include:
  • the performing a rheological analysis on the key points includes:
  • a rheological analysis is performed on the key points by using a numerical simulation analysis method.
  • the ground settlement prediction model of the double-cavity salt cavern reservoir is constructed according to the rheological analysis result of the key point, including:
  • the determined time-varying model of each key point settlement and the horizontal attenuation model of land subsidence are determined as the prediction model of the ground settlement of the double-solution cavern reservoir.
  • the method further includes:
  • the ground settlement of the double-cavity salt cavern reservoir is predicted according to the prediction model of the ground settlement of the double-cavity salt cavern reservoir and the model parameters.
  • an apparatus for constructing a prediction model for a ground settlement of a double-solution cavity salt reservoir comprising:
  • An analysis module is configured to perform rheological analysis on the key points to obtain a rheological analysis result of the key points;
  • the construction module is used to construct a prediction model of the ground settlement of the double-solution cavern reservoir based on the rheological analysis results of the key points.
  • the selecting module includes:
  • a projection unit configured to project two vaults of the double-solution cavity salt reservoir to the ground
  • a determining unit configured to determine a midpoint of the projection connection as a center point
  • a selecting unit configured to use the center point as a starting point, select at least two points at a preset distance, and use the center point and the selected at least two points as the double-solution cavity salt storage Key points of the library's 3D geological analysis model.
  • the first analyzing module includes:
  • a determining unit for determining a rheological model of the three-dimensional geological analysis model of the double-solution cavity salt reservoir according to the rheological experiment result of the salt rock;
  • an analysis unit configured to perform rheological analysis on the key points under different internal pressures according to the rheological model by using a numerical simulation analysis method.
  • the building module includes:
  • a first determining unit configured to determine a settlement model of each key point with time and a horizontal attenuation model of the ground settlement according to the rheological analysis result of the key point;
  • the second determining unit is configured to determine the determined settling time variation model of each key point and the ground settlement horizontal direction attenuation model as a double settlement cavity salt storage reservoir ground settlement prediction model.
  • the device include:
  • a second analysis module is configured to perform regression analysis on the ground settlement prediction model of the double-solution cavity salt storage reservoir, and obtain model parameters of the ground settlement prediction model of the double-solution cavity salt storage;
  • the prediction module is configured to predict the ground subsidence of the double-solution cavity salt storage reservoir according to the prediction model of the ground settlement of the double-solution cavity reservoir and the model parameters.
  • the three-dimensional geological analysis model of the double-solution cavity salt reservoir is established by the information of the double-solution cavity reservoir, and the prediction model of the ground settlement of the double-solution cave reservoir is constructed according to the three-dimensional geological analysis model of the double-solution cavity reservoir. . Because the three-dimensional geological analysis model of the double-solution cavity reservoir can accurately reflect the anisotropy of the salt layer in three-dimensional space, the model of the ground settlement prediction model of the double-solution cavern reservoir is improved. The accuracy of the prediction of the ground settlement of the cavern salt reservoir.
  • FIG. 1 is a flow chart of a method for constructing a land subsidence prediction model for a double-solution cavity salt cavern according to a first embodiment of the present invention
  • FIG. 2 is a flow chart of a method for constructing a prediction model of a ground settlement of a double-solution chamber salt cavern according to a second embodiment of the present invention
  • FIG. 3 is a schematic diagram showing the setting of key points of a double-solution chamber salt cavern storage provided by the second embodiment of the present invention.
  • FIG. 4 is a schematic view showing the variation of the settlement amount of the key point with the internal pressure when the rheological time is the same according to the second embodiment of the present invention
  • Figure 5 is a schematic view showing the change of the settlement amount of the key point with the rheological time when the internal pressure is the same according to the second embodiment of the present invention
  • FIG. 6 is a schematic structural view of a device for constructing a ground subsidence prediction model for a double-solution cavity salt storage tank according to a third embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a selection module according to Embodiment 3 of the present invention.
  • FIG. 8 is a schematic structural diagram of a first analysis module according to Embodiment 3 of the present invention.
  • FIG. 9 is a schematic structural diagram of a building module according to Embodiment 3 of the present invention.
  • FIG. 10 is a schematic structural diagram of a second apparatus for constructing a land subsidence prediction model for a double-solution cavity salt storage tank according to a third embodiment of the present invention.
  • the embodiment of the invention provides a prediction model for constructing the ground settlement of the double-cavity salt cavern reservoir.
  • the method can be used to predict the ground subsidence of the double-solution cavity salt reservoir by constructing the ground settlement model of the double-solution cavity reservoir, so as to provide guidance for the management of the double-solution salt cave reservoir in time.
  • the method process provided by this embodiment includes:
  • the key points of the three-dimensional geological analysis model of the double-solution cavity salt reservoir are selected, including:
  • At least two points are selected, and the center point and the selected two points are used as the key points of the three-dimensional geological analysis model of the double-solution cavity reservoir.
  • rheological analysis of key points includes:
  • the rheological model of the three-dimensional geological analysis model of the double-solution cavern reservoir is determined;
  • the numerical analysis method is used to analyze the rheological changes of key points.
  • the ground settlement prediction model of the double-solution cavity salt reservoir is constructed according to the rheological analysis result of the key points, including:
  • the determined time-varying model of each key point settlement and the horizontal attenuation model of land subsidence are determined as the prediction model of the ground settlement of the double-solution cavern reservoir.
  • the method further includes:
  • Regression analysis was carried out on the prediction model of the ground settlement of the double-solution cavern reservoir, and the model parameters of the prediction model of the ground settlement of the double-solution cavern reservoir were obtained.
  • the ground settlement of the double-cavity salt cavern reservoir is predicted.
  • the method provided by the embodiment establishes a three-dimensional geological analysis model of the double-solution cavity salt reservoir through the information of the double-solution cavity salt reservoir, and constructs the double-solution cavity salt according to the three-dimensional geological analysis model of the double-solution cavity salt reservoir. Prediction model for ground settlement of cave reservoirs. Because the three-dimensional geological analysis model of the double-solution cavity reservoir can accurately reflect the anisotropy of the salt layer in three-dimensional space, the model of the ground settlement prediction model of the double-solution cavern reservoir is improved. The accuracy of the prediction of the ground settlement of the cavern salt reservoir.
  • the embodiment of the present invention provides a method for constructing a prediction model of a ground settlement of a double-cavity salt cavern reservoir.
  • the double-solution cavity salt reservoir provided by the embodiment of the present invention is combined with the content of the first embodiment.
  • the method of predicting the land subsidence model is explained in detail. Referring to FIG. 2, the method process provided by this embodiment includes:
  • 201 Obtain information of the double-solution cavity salt reservoir, and establish a three-dimensional geological analysis model of the double-solution cavity salt reservoir according to the information of the double-solution cavity reservoir.
  • the information of the double-solution cavity salt reservoir includes, but is not limited to, the geological information of the double-solution cavity salt reservoir and the cavity shape parameters.
  • the geological information of the double-solution cavity reservoir includes, but is not limited to, the longitudinal and transverse profiles of the cavern reservoir, the distribution of the strata, the lithology, and the physical and mechanical parameters of the rock and soil.
  • Cavity shape parameters include, but are not limited to, the volume, height, width, cavity spacing, etc. of the cavity.
  • the ground layer is a soil layer, a mud layer, a salt layer, an interlayer, etc., and the embodiment does not specifically define the formation.
  • Physical and mechanical indicators of rock and soil include but not limited In terms of elastic modulus, Poisson's ratio, cohesiveness, tensile strength, and the like.
  • Methods for obtaining geological information from a double-solution chamber salt reservoir include, but are not limited to, acquisition using geological analysis equipment.
  • the manner in which the shape information of the cavity of the double-solution cavity reservoir is obtained includes, but is not limited to, acquisition by a measuring device.
  • the cavity shape and stratum distribution of the double-cavity salt cave reservoir are the physical mechanics of the rock and soil in the double-cavity salt cavern reservoir.
  • the indicators have an important impact: the physical and mechanical indexes of the rock and soil bodies of the double-cavity salt cavern reservoirs with different cavity shapes are different, and the physical and mechanical indexes of the rock and soil bodies of different strata in the same double-cavity salt cavern reservoir are also different. of.
  • each single chamber in the double-solution chamber is 250,000 cubic meters, and each chamber is 140 meters high.
  • An example in which each cavity has a width of 60 meters is described. See Table 1 for details.
  • 3D geological analysis model A method for establishing a three-dimensional geological analysis model of a double-solution cavity salt reservoir according to the information of the double-solution cavity reservoir, including but not limited to using the modeling software to construct a double according to the obtained information of the double-solution salt reservoir A three-dimensional geological analysis model of the cavern reservoir.
  • the modeling software used is not limited.
  • the three-dimensional geological analysis model of the double-solution cavity salt reservoir can be established according to the information of the double-solution cavity reservoir.
  • the key points of the three-dimensional geological analysis model of the double-solution cavern reservoir can represent the entire double-cavity salt cave reservoir
  • the key points are selected on the three-dimensional geological analysis model of the double-solution cavity salt reservoir, so that the subsequent steps can be analyzed by constructing the double-cavity salt cavern storage by selecting the key points of the three-dimensional geological analysis model of the selected double-solution cavern reservoir. Reservoir land subsidence prediction model.
  • the manner of selecting the key points of the three-dimensional geological analysis model of the double-solution cavity reservoir includes, but is not limited to, adopting the following methods:
  • the two vaults of the double-solution cavity salt reservoir are respectively projected to the ground, and the midpoint of the projection connection is determined as the center point;
  • the center point as the starting point and selecting the at least two points by the preset distance, and the center point and the selected at least two points are the key points of the three-dimensional geological analysis model of the double-solution cavity salt reservoir. .
  • the preset distance may be 20 meters, 50 meters, 60 meters, etc., and the preset distance is not specifically limited in this embodiment.
  • Figure 3 is a schematic illustration of the key point settings for a double-solution chamber salt reservoir.
  • the key point selected by the same preset distance is used as the step point.
  • the position of the double-solution cavity salt reservoir is larger, and the position near the center point is larger.
  • the key point is the main analysis point for predicting the ground subsidence of the double-solution cavern reservoir. Therefore, when selecting the key points, the points can be intensively close to the center point, and further away from the center point. Large step sizes select key points.
  • the method provided in this embodiment needs to perform rheological analysis on key points, and then Get the rheological analysis results of the key points.
  • the rheological analysis of the key points includes, but is not limited to, the following steps:
  • the rheological model of the three-dimensional geological analysis model of the double-solution cavity salt reservoir is determined according to the rheological experiment results of the salt rock;
  • the rheological model method includes, but is not limited to, performing a predetermined number of salt rock rheological experiments on a three-dimensional geological analysis model of a double-solution cavity salt reservoir, and obtaining experimental results of a predetermined number of salt rock rheological experiments.
  • the obtained results of the salt rock rheological experiment were fitted to obtain a rheological model of the three-dimensional geological analysis model of the double-solution cavity salt reservoir.
  • the obtained results of the salt rock rheological experiment including but not limited to the following formula:
  • ⁇ t is the initial creep strain
  • C is a constant
  • a and n are material parameters
  • ⁇ 1 and ⁇ 3 are the maximum stress and the minimum principal stress, respectively
  • B and ⁇ are material parameters
  • t is time. .
  • Model parameters of the rheological model In order to facilitate the subsequent analysis and calculation based on the rheological model of the three-dimensional geological analysis model of the double-solution cavity reservoir, it is necessary to first determine the three-dimensional geological analysis model of the double-solution cavity reservoir.
  • Model parameters of the rheological model The method for determining the model parameters of the rheological model of the three-dimensional geological analysis model of the double-solution cavity reservoir is not specifically limited in this embodiment.
  • the model parameters of the rheological model of the three-dimensional geological analysis model of the double-solution cavern reservoir are determined.
  • MPa is megapascal.
  • the rheological model is used to perform rheological analysis on key points using numerical simulation methods.
  • the numerical simulation analysis method is also called computer simulation method.
  • the numerical simulation analysis method is a kind of electronic computing method, which realizes the purpose of researching engineering problems, physical problems and even various problems in nature through numerical calculation and image display methods. method.
  • a more precise double solution is constructed.
  • the ground settlement prediction model of the cave salt reservoir this step can be used to analyze the rheological changes of key points according to the rheological model using numerical simulation analysis method.
  • the first case the rheological time is the same and the internal pressure is different;
  • a single variable principle can be used to analyze the rheological behavior of the double-solution cavity reservoir under different internal pressures under the same rheological time.
  • Fig. 4 is a graph showing the change in the amount of settlement at a critical point as a function of internal pressure at the same rheological time. It can be seen from Fig. 4 that when the rheological time is 2 years, the ground settlement when the internal pressure is 5 MPa is greater than the ground settlement when the internal pressure is 10 MPa; when the rheological time is 5 years, the key point is When the internal pressure is 5MPa, the ground settlement amount is greater than the ground settlement when the internal pressure is 10MPa; when the rheological time is 10 years, the ground settlement when the internal pressure is 5MPa is greater than the internal pressure is 10MPa.
  • the second case the rheology time is different and the internal pressure is the same.
  • Fig. 5 is a schematic diagram showing the change of the settlement amount of the key point with the rheological time when the internal pressure is the same.
  • the key points set are A, B, C, D, E in Fig. 3, and the internal pressure is 10 MPa as an example. It can be seen from Fig. 5 that when the rheological time is 10 years, the ground settlement of the key point A is smaller than the ground settlement of the key point B, and the ground settlement of the key point B is smaller than the ground settlement of the key point C, the key point The ground settlement of C is smaller than the ground settlement of key point D.
  • the ground settlement of key point D is smaller than the ground settlement of key point E, and the distance between key points A, B, C, D, E from the center point is gradually increased.
  • this step builds the double-lumen cavity salt based on the rheological analysis result of the key point on the basis of the above step 203.
  • Prediction model for ground settlement of cave reservoirs Specifically, according to the rheological analysis results of the key points, the ground settlement prediction model of the double-cavity salt cavern reservoir is constructed. According to the rheological analysis results of the key points, the settlement model of each key point with time and the attenuation model of the ground settlement horizontal direction can be determined. Then, the determined settlement model of each key point with time and the horizontal attenuation model of land subsidence are determined as the prediction model of the ground settlement of the double-solution cavern reservoir.
  • this step can determine the following model of settlement of each key point with time according to the results of this rheological analysis:
  • S is the ground settlement of the key points on the ground
  • t is the rheological time
  • a and b are the model parameters.
  • this step can determine the following attenuation model of the horizontal settlement according to the rheological analysis results:
  • Sr is the settlement of the ground from the center point r
  • r is the distance from the center point
  • c, d, e, and f are model parameters.
  • the model parameters of the prediction model of the ground settlement of the double-solution cavern reservoir are obtained, and then the ground settlement of the double-cavity salt cavern reservoir is predicted according to the prediction model of the ground settlement of the double-cavity salt cavern reservoir and the model parameters.
  • the regression analysis is based on the mastery of a large number of observation data, using mathematical statistics to establish a regression relationship function expression between the dependent variable and the independent variable.
  • the regression analysis is carried out on the prediction model of the ground settlement of the double-cavity salt cavern reservoir, and the model parameters of the prediction model of the ground settlement of the double-solution cavern reservoir are obtained in Table 3 and Table 4.
  • Table 3 is the model parameter of the key point settlement with time change when the internal pressure is 5MPa.
  • Table 4 shows the parameters of the surface subsidence horizontal direction attenuation fitting model when the internal pressure is 10 MPa.
  • a three-dimensional geological analysis model of a double-solution cavity salt reservoir is established by using information of a double-solution cavity salt reservoir, and a double-solution cavity is constructed according to a three-dimensional geological analysis model of a double-solution cavity salt reservoir.
  • Prediction model of ground subsidence in salt cavern storage Because the three-dimensional geological analysis model of the double-solution cavity reservoir can accurately reflect the anisotropy of the salt layer in three-dimensional space, the model of the ground settlement prediction model of the double-solution cavern reservoir is improved. The accuracy of the prediction of the ground settlement of the cavern salt reservoir.
  • an embodiment of the present invention provides a device for constructing a prediction model for a ground settlement of a double-solution cavity salt storage, the device comprising:
  • the obtaining module 601 is configured to obtain information about the double-solution cavity salt reservoir
  • the module 603 is selected to select a key point of the three-dimensional geological analysis model of the double-solution cavity salt reservoir,
  • the first analysis module 604 is configured to perform rheological analysis on the key points to obtain a rheological analysis result of the key points;
  • the construction module 605 is configured to construct a ground settlement prediction model of the double-solution cavity salt reservoir according to the rheological analysis result of the key points.
  • the selection module 603 includes:
  • a projection unit 6031 configured to project two vaults of the double-solution cavity salt reservoir to the ground;
  • a determining unit 6032 configured to determine a midpoint of the projection connection as a center point
  • the selecting unit 6033 is configured to select at least two points with the center point as a starting point and the preset distance as the starting point, and select the center point and the selected at least two points as the three-dimensional geological analysis model of the double-solution cavity salt reservoir. key point.
  • the first analysis module 604 includes:
  • a determining unit 6041 configured to determine a rheological model of the three-dimensional geological analysis model of the double-solution cavity salt reservoir according to the rheological experiment result of the salt rock;
  • the analyzing unit 6042 is configured to perform rheological analysis on the key points by using a numerical simulation analysis method according to the rheological model.
  • the building block 605 includes:
  • the first determining unit 6051 is configured to determine a settlement model of each key point with time and a horizontal attenuation model of the ground settlement according to the rheological analysis result of the key point;
  • the second determining unit 6052 is configured to determine the determined time-varying settlement model of each key point and the horizontal attenuation model of the ground subsidence as a prediction model of the ground settlement of the double-solution cavity salt storage.
  • the device further includes:
  • the second analysis module 606 is configured to perform regression analysis on the ground settlement prediction model of the double-solution cavity salt storage reservoir, and obtain model parameters of the ground settlement prediction model of the double-solution cavity salt storage;
  • the prediction module 607 is configured to predict the ground settlement of the double-solution cavity salt storage reservoir according to the ground settlement prediction model and the model parameters of the double-solution cavity reservoir.
  • the device provided by the embodiment of the invention establishes a three-dimensional geological analysis model of a double-solution cavity salt reservoir through the information of the double-solution cavity salt reservoir, and constructs a three-dimensional geological analysis model according to the double-solution cavity salt reservoir.
  • a prediction model for ground settlement of a double-solution cavern reservoir is constructed. Because the three-dimensional geological analysis model of the double-solution cavity reservoir can accurately reflect the anisotropy of the salt layer in three-dimensional space, the model of the ground settlement prediction model of the double-solution cavern reservoir is improved. The accuracy of the prediction of the ground settlement of the cavern salt reservoir.
  • the device for constructing a prediction model for the ground settlement of the double-cavity salt cavern storage provided by the above embodiment is only illustrated by the division of the above functional modules when constructing the prediction model of the ground settlement of the double-solution cavity reservoir.
  • the above function assignments may be completed by different functional modules as needed, and the internal structure of the device for constructing a double settlement cavity salt storage reservoir ground subsidence prediction model is divided into different functional modules to complete the above description. All or part of the function.
  • the apparatus for constructing a ground settlement prediction model for a double-solution cavity salt storage reservoir provided by the above embodiment and the method embodiment for constructing a ground settlement prediction model for a double-solution cavity salt storage reservoir belong to the same concept, and the specific implementation process thereof is described in the method implementation. For example, I won't go into details here.
  • a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium.
  • the storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.

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Abstract

L'invention se rapporte à un dispositif de construction d'un modèle de prédiction de subsidence du sol d'un réservoir de caverne de sel à deux cavités, comprenant : un module d'acquisition (601) conçu pour acquérir des informations d'un réservoir de caverne de sel à deux cavités ; un module d'établissement (602) servant à établir un modèle d'analyse géologique en 3D de réservoir de caverne de sel à deux cavités selon les informations de réservoir de caverne de sel à deux cavités ; un module de sélection (603) permettant de sélectionner des points clés du modèle d'analyse géologique en 3D du réservoir de caverne de sel à deux cavités ; un premier module d'analyse (604) prévu pour effectuer une analyse rhéologique des points clés afin d'obtenir un résultat d'analyse rhéologique des points clés ; et un module de construction (605) destiné à construire un modèle de prédiction de subsidence du sol d'un réservoir de caverne de sel à deux cavités en fonction du résultat d'analyse rhéologique des points clés. Cette invention améliore la précision de prédiction de la subsidence du sol d'un réservoir de caverne de sel à deux cavités grâce à l'adoption du modèle de prédiction construit de la subsidence du sol d'un réservoir de caverne de sel à deux cavités.
PCT/CN2015/096203 2015-08-24 2015-12-02 Dispositif de construction d'un modèle de prédiction de subsidence du sol d'un réservoir de caverne de sel à deux cavités WO2017031857A1 (fr)

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